US20120213620A1 - Apparatus for the handling of multiwall bags containing powdered or particulate material - Google Patents
Apparatus for the handling of multiwall bags containing powdered or particulate material Download PDFInfo
- Publication number
- US20120213620A1 US20120213620A1 US13/505,046 US201013505046A US2012213620A1 US 20120213620 A1 US20120213620 A1 US 20120213620A1 US 201013505046 A US201013505046 A US 201013505046A US 2012213620 A1 US2012213620 A1 US 2012213620A1
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- US
- United States
- Prior art keywords
- bag
- slitting
- station
- trimming
- transverse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B69/00—Unpacking of articles or materials, not otherwise provided for
- B65B69/0008—Opening and emptying bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
- B65D33/22—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using heat-activatable adhesive
Definitions
- This invention relates to an apparatus to facilitate the handling of multi-wall bags containing powdered or particular material or product, more specifically but not limited to the emptying of ex factory bags containing milk powder for further processing.
- Milk powder ex factory is most often packed in multiwall bags ranging from 10-30 kg, but typically 25 kg in weight that have a multilayer brown (Kraft) paper outer bag for handling strength and a plastic inner liner for powder containment.
- the bags are sealed using a heat sealer that acts through the paper bag to seal the inner plastic liner.
- the paper bag is sealed by folding its protruding flap over and re-heating hot melt glue on the underside of the flap.
- a line of cuts/perforation is scored along the inside of the plastic liner bag to assist separation of the plastic liner from the outer paper bag when this is required.
- small traces of hot-melt glue are used to fix the inner plastic liner to the outer paper bag in order to assist filling the bag with powder in an automated process.
- the aim of the invention is to provide an apparatus to facilitate the handling of multi-wall bags containing powdered or particular material or product, more specifically but not limited to the emptying the contents from ex factory bags containing milk powder in a hygienic manner for further processing.
- the invention provides an apparatus to facilitate the emptying of the contents from a multiwall bag having a paper outer layer(s) and an inner plastic liner containing powdered or particular material or product comprising:
- transverse slitting blade device associated with said slitting table station
- a hopper station to receive the powdered or particular material or product.
- the trimming table station and the slitting table stations are separated by one or more conveyors; the trimming table station includes a slitting blade device, expediently a rotary device and associated transverse guide rail and is located at one end of the trimming table.
- the bag separator device further comprises a spreading arm to engage between the inside surface of the paper layer(s) and outer surface of the inner plastic liner of the multiwall bag; and a pivoting device coupled to the arm.
- the transverse slitting blade device of the slitting table station further comprises a sliding blade movable in a transverse direction across the slitting table station and at least two, more preferably three or four rotary blades mounted to cut in a longitudinal direction.
- FIG. 1 is a longitudinal cross-sectional view of a multiwall bag containing product
- FIGS. 2A , 2 B and 2 C are schematic elevation views of a first embodiment of apparatus at the various stations stages of operation;
- FIG. 2D is an enlarged view of the slitting table station
- FIGS. 3A , 3 B, 3 C, 3 D and 3 E are schematic elevation views of a second embodiment of apparatus at the various stations stages of operation.
- milk powder 1 is most often packed in multiwall bags as shown schematically in FIG. 1 of the drawings that have a multilayer brown paper (Kraft paper) outer bag 2 for handling strength, and a plastic inner liner 3 for powder containment.
- the bags are sealed using a heat sealer that acts through the paper bag to seal the plastic liner as shown at 4 .
- the outer paper bag 2 is sealed by folding its protruding flap over and re-heating hot melt glue on the underside of the flap 5 .
- a score line 6 is made along the inside of the plastic liner bag to assist separation of the plastic liner 3 from the paper bag 2 when this is required.
- small tacks of hot-melt glue are used to fix the plastic liner 3 to the paper bag 2 in order to assist filling the bag with powder in an automated process.
- This apparatus facilitates separation the sealed inner plastic liner bag 3 and its contents from the outer paper bag 2 in order that:
- a multiwall bag containing milk powder will be lifted by a first operator onto a trimming table station 8 by use of a conventional vacuum lifting hoist H ( FIG. 3A ).
- the full bag 9 is rotated by the operator 10 so that its top seal region is presented to rotary cutting device 11 and associated transverse guide rail located at one end of the trimming table 8 a .
- the bag 9 is positioned so the cutting device can cut both the paper and the plastic bag tops near the perforated score line 6 and without cutting below the plastic liner seal 4 .
- the trimming station 8 includes a frame having support legs 17 and includes a foot operated clamping jaw 7 (embodiment 1) to securely hold the neck region of the bag prior to trimming.
- the bag top is cut and removed by the cutter blade 11 action.
- the outer paper bag 2 will now be fully opened showing the sealed plastic liner bag 3 lying inside it.
- the bag separator device 12 is associated with a first in-feed conveyor station depicted generally as C 1 .
- the separator 12 includes a U-shaped separator bar 35 mounted on a yoke 36 pivotally mounted to the in-feed conveyor frame at 37 .
- a pneumatic ram 38 is affixed to the yoke 36 to effect said pivotal action the purpose of which will be explained.
- the bag assembly 9 is rotated through 180° on the trimming table 8 a facing the in-feed conveyor C 1 so that the open paper bag neck end can be presented to the bag separator device 12 as shown at 13 in FIG. 2B .
- the paper bag neck is held up while the bag is pushed onto the separator bar 35 , thus inserting the separator bar between the paper outer bag 2 and the inner plastic liner 3 .
- the operator will activate the bag separator device, causing ram 38 to tilt the bar 35 upwards as shown at 14 in FIG. 2C .
- This action retains the outer paper bag 2 while allowing the inner sealed plastic liner bag 3 to slide out of it onto the moving in-feed transport conveyor C 1 as shown at 15 of FIG. 2C .
- the bag separator device 12 is lowered to its start level and the outer paper bag 2 is removed to waste W by the operator 10 .
- the paper bag removal system is thus ready for another cycle.
- a plastic liner bag containing powder will now wait on conveyor C 1 for entry to the bag slitting station table 18 .
- the in-feed transport conveyor C 1 carries the plastic liner bag and its contents 9 into a more hygienic processing area behind a barrier wall as schematically depicted by numeral 16 in FIG. 2C .
- a second conveyer station C 2 is located immediately behind wall 16 and inline with conveyor C 1 .
- This station conveys the bag 9 onto the bag slitting station table 18 .
- Table 18 can be tilted by ram 40 to an inclined position as best shown in FIG. 2D of the drawings. This enables a bag stationed on the table 18 to slide over the slitting knives into the hopper 20 as will be explained hereinafter.
- the sifter 24 When the bag dump denoted generally by numeral 20 is activated, the sifter 24 , the dust collection fan 25 and the powder transport line will activate ready to accept powder.
- a second operator 19 requests a plastic bag 9 of powder from conveyor C 1 by pressing a button on the second conveyor station C 2 .
- the bag moves from conveyor station C 1 and is accelerated by conveyor C 2 onto the bag slitting station table 18 , coming to rest against a retainer bar 22 .
- a plastic bag 9 of powder waiting at barrier 22 is slit and dumped when the operator 19 activates the slitter by pressing a two handed control set.
- a knife 30 under the slitter table 18 cuts the plastic bag transversely across its width and up to four cutting blades 32 positioned under the slitting table start to rotate via a pneumatic motor 31 .
- the slitter table tilts ( FIG. 2D ), the barrier 22 lifts ( FIG. 2D ) and the bag 9 slides into the dump hopper 20 and onto the bag retainer grill 29 over the rotating blades.
- the bag 9 being slit once across its width and up to four times along its length on its underside, readily discharges its powder content into the bag dump hopper 20 .
- the ribbons of plastic created from the underside of the bag 9 are each retained by being attached to the upper side of the bag proper.
- the operator 19 is able to empty the plastic bag corners into the dump hopper 20 while ensuring the bag stays above the retainer grid 29 .
- the emptied bag is disposed to waste W. The process continues as long as there is bagged powder to present to the slitter table 18 and the powder transport system remains active.
- the sifter 24 can be detached from an inactive bag dump and removed on its own castor wheel set for cleaning.
- this arrangement differs in the initial bag handling at the trimming station 8 .
- an operator uses a vacuum hoist H to lift a bag 9 from a pallet to the trimming table 8 a which is mounted on a frame having support legs 17 .
- the trimming table 8 a is supported by a pair of arms 8 b mounted to the frame for sliding forward and backward motion via sliding carriages 8 c.
- the operator orients the bag 9 such that the neck region faces the spreader bar 35 as previously described for the first embodiment.
- the table 8 a is slid back clear of the spreader bar 35 to enable the top to be cut off by rotary cutting device 11 (not shown on FIG. 3A-3D for clarity).
- the open bag is lifted over the bag separator bar 35 and both the bag and table 8 a are slid forward until the separator bar reaches the bottom of the paper bag above the inner liner bag.
- the table 8 a together with bag 9 is pivoted about pivot 37 by the action of pneumatic ram 38 ( FIG. 3E ) until the liner bag containing the product slides out onto conveyor 1 and the outer paper bag is retained on the spreader bar.
- the table 8 a and spreader bar 35 may be retracted to enable the paper bag to be removed to waste W.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
Abstract
Description
- This invention relates to an apparatus to facilitate the handling of multi-wall bags containing powdered or particular material or product, more specifically but not limited to the emptying of ex factory bags containing milk powder for further processing.
- Milk powder ex factory is most often packed in multiwall bags ranging from 10-30 kg, but typically 25 kg in weight that have a multilayer brown (Kraft) paper outer bag for handling strength and a plastic inner liner for powder containment. The bags are sealed using a heat sealer that acts through the paper bag to seal the inner plastic liner. The paper bag is sealed by folding its protruding flap over and re-heating hot melt glue on the underside of the flap. A line of cuts/perforation is scored along the inside of the plastic liner bag to assist separation of the plastic liner from the outer paper bag when this is required. When the bags are constructed, small traces of hot-melt glue are used to fix the inner plastic liner to the outer paper bag in order to assist filling the bag with powder in an automated process.
- In order to comply with hygiene requirements, hygienic recovery of the bag contents is required before the product can be further processed into for example infant formula, retail packs or the like. The outer bag which may be contaminated must be removed in a way that maintains the cleanliness of the inner plastic liner bag.
- To date, various apparatuses are available in use for the emptying of product from bulk bags but these are not focused on recovering the contents in a hygienic manner. Accordingly, the recovery of the product is often an entirely manual operation which requires a greater number of operators; is physically onerous and greatly increases the risk for cross contamination of the product.
- The aim of the invention is to provide an apparatus to facilitate the handling of multi-wall bags containing powdered or particular material or product, more specifically but not limited to the emptying the contents from ex factory bags containing milk powder in a hygienic manner for further processing.
- According to a first broad aspect, the invention provides an apparatus to facilitate the emptying of the contents from a multiwall bag having a paper outer layer(s) and an inner plastic liner containing powdered or particular material or product comprising:
- a trimming table station;
- a bag separator device associated with said trimming table station;
- an outer layer cutter associated with said trimming station;
- an inner liner slitting table station;
- a transverse slitting blade device associated with said slitting table station; and
- a hopper station to receive the powdered or particular material or product.
- In a preferred embodiment, the trimming table station and the slitting table stations are separated by one or more conveyors; the trimming table station includes a slitting blade device, expediently a rotary device and associated transverse guide rail and is located at one end of the trimming table.
- The bag separator device further comprises a spreading arm to engage between the inside surface of the paper layer(s) and outer surface of the inner plastic liner of the multiwall bag; and a pivoting device coupled to the arm.
- The transverse slitting blade device of the slitting table station further comprises a sliding blade movable in a transverse direction across the slitting table station and at least two, more preferably three or four rotary blades mounted to cut in a longitudinal direction.
- In further describing invention by way of a preferred embodiment, reference will be made to the accompanying drawings in which:
-
FIG. 1 is a longitudinal cross-sectional view of a multiwall bag containing product; -
FIGS. 2A , 2B and 2C are schematic elevation views of a first embodiment of apparatus at the various stations stages of operation; -
FIG. 2D is an enlarged view of the slitting table station; -
FIGS. 3A , 3B, 3C, 3D and 3E are schematic elevation views of a second embodiment of apparatus at the various stations stages of operation. - By way of background,
milk powder 1 is most often packed in multiwall bags as shown schematically inFIG. 1 of the drawings that have a multilayer brown paper (Kraft paper)outer bag 2 for handling strength, and a plastic inner liner 3 for powder containment. The bags are sealed using a heat sealer that acts through the paper bag to seal the plastic liner as shown at 4. Theouter paper bag 2 is sealed by folding its protruding flap over and re-heating hot melt glue on the underside of the flap 5. A score line 6 is made along the inside of the plastic liner bag to assist separation of the plastic liner 3 from thepaper bag 2 when this is required. When the multiwall bags are constructed, small tacks of hot-melt glue are used to fix the plastic liner 3 to thepaper bag 2 in order to assist filling the bag with powder in an automated process. - This apparatus facilitates separation the sealed inner plastic liner bag 3 and its contents from the
outer paper bag 2 in order that: -
- Hygienic recovery of the bag contents is achieved. The outer bag is removed in a way that maintains the cleanliness of the plastic liner bag
- The inner plastic liner bag and seal remains intact in order to contain the powdered product within so that it can be transported to a separate hygienic emptying process.
- The labour content of the process of removing the outer paper bag and subsequently the inner plastic liner bag in order to dump the powder contents is reduced because of more efficient handling of all components.
- The drawings disclose two preferred embodiments, like components will be denoted by the same numbers.
- A multiwall bag containing milk powder will be lifted by a first operator onto a
trimming table station 8 by use of a conventional vacuum lifting hoist H (FIG. 3A ). - The
full bag 9 is rotated by theoperator 10 so that its top seal region is presented to rotary cutting device 11 and associated transverse guide rail located at one end of the trimming table 8 a. Thebag 9 is positioned so the cutting device can cut both the paper and the plastic bag tops near the perforated score line 6 and without cutting below theplastic liner seal 4. Thetrimming station 8 includes a frame havingsupport legs 17 and includes a foot operated clamping jaw 7 (embodiment 1) to securely hold the neck region of the bag prior to trimming. The bag top is cut and removed by the cutter blade 11 action. Theouter paper bag 2 will now be fully opened showing the sealed plastic liner bag 3 lying inside it. - The
bag separator device 12 is associated with a first in-feed conveyor station depicted generally as C1. Theseparator 12 includes a U-shapedseparator bar 35 mounted on ayoke 36 pivotally mounted to the in-feed conveyor frame at 37. Apneumatic ram 38 is affixed to theyoke 36 to effect said pivotal action the purpose of which will be explained. - The
bag assembly 9 is rotated through 180° on the trimming table 8 a facing the in-feed conveyor C1 so that the open paper bag neck end can be presented to thebag separator device 12 as shown at 13 inFIG. 2B . The paper bag neck is held up while the bag is pushed onto theseparator bar 35, thus inserting the separator bar between the paperouter bag 2 and the inner plastic liner 3. When thebag separator bar 35 reaches the bottom of the paper bag, the operator will activate the bag separator device, causingram 38 to tilt thebar 35 upwards as shown at 14 inFIG. 2C . This action retains theouter paper bag 2 while allowing the inner sealed plastic liner bag 3 to slide out of it onto the moving in-feed transport conveyor C1 as shown at 15 ofFIG. 2C . Thebag separator device 12 is lowered to its start level and theouter paper bag 2 is removed to waste W by theoperator 10. The paper bag removal system is thus ready for another cycle. A plastic liner bag containing powder will now wait on conveyor C1 for entry to the bag slitting station table 18. - The in-feed transport conveyor C1 carries the plastic liner bag and its
contents 9 into a more hygienic processing area behind a barrier wall as schematically depicted by numeral 16 inFIG. 2C . - A second conveyer station C2 is located immediately behind
wall 16 and inline with conveyor C1. This station conveys thebag 9 onto the bag slitting station table 18. Table 18 can be tilted byram 40 to an inclined position as best shown inFIG. 2D of the drawings. This enables a bag stationed on the table 18 to slide over the slitting knives into thehopper 20 as will be explained hereinafter. - When the bag dump denoted generally by
numeral 20 is activated, thesifter 24, thedust collection fan 25 and the powder transport line will activate ready to accept powder. - A
second operator 19 requests aplastic bag 9 of powder from conveyor C1 by pressing a button on the second conveyor station C2. The bag moves from conveyor station C1 and is accelerated by conveyor C2 onto the bag slitting station table 18, coming to rest against aretainer bar 22. - Whenever a
plastic liner bag 9 is available, it is sensed by photo-eye 23 on in-feed conveyor C1. If the slitter table 18 is in its lowered position, the bag will be automatically transported across conveyor C2 to the slitter table 18. - A
plastic bag 9 of powder waiting atbarrier 22 is slit and dumped when theoperator 19 activates the slitter by pressing a two handed control set. Aknife 30 under the slitter table 18 cuts the plastic bag transversely across its width and up to fourcutting blades 32 positioned under the slitting table start to rotate via apneumatic motor 31. The slitter table tilts (FIG. 2D ), thebarrier 22 lifts (FIG. 2D ) and thebag 9 slides into thedump hopper 20 and onto thebag retainer grill 29 over the rotating blades. Thebag 9 being slit once across its width and up to four times along its length on its underside, readily discharges its powder content into thebag dump hopper 20. The ribbons of plastic created from the underside of thebag 9 are each retained by being attached to the upper side of the bag proper. Theoperator 19 is able to empty the plastic bag corners into thedump hopper 20 while ensuring the bag stays above theretainer grid 29. The emptied bag is disposed to waste W. The process continues as long as there is bagged powder to present to the slitter table 18 and the powder transport system remains active. - The
sifter 24 can be detached from an inactive bag dump and removed on its own castor wheel set for cleaning. - Referring to embodiment 2 (
FIGS. 3A-3E ); this arrangement differs in the initial bag handling at the trimmingstation 8. - As shown in
FIG. 3A , an operator uses a vacuum hoist H to lift abag 9 from a pallet to the trimming table 8 a which is mounted on a frame havingsupport legs 17. The trimming table 8 a is supported by a pair of arms 8 b mounted to the frame for sliding forward and backward motion via slidingcarriages 8 c. - In use, the operator orients the
bag 9 such that the neck region faces thespreader bar 35 as previously described for the first embodiment. The table 8 a is slid back clear of thespreader bar 35 to enable the top to be cut off by rotary cutting device 11 (not shown onFIG. 3A-3D for clarity). - The open bag is lifted over the
bag separator bar 35 and both the bag and table 8 a are slid forward until the separator bar reaches the bottom of the paper bag above the inner liner bag. - The table 8 a together with
bag 9 is pivoted aboutpivot 37 by the action of pneumatic ram 38 (FIG. 3E ) until the liner bag containing the product slides out ontoconveyor 1 and the outer paper bag is retained on the spreader bar. The table 8 a andspreader bar 35 may be retracted to enable the paper bag to be removed to waste W. - It will be appreciated preferred embodiment by way of description only, and the invention is open to modification without departing from the spirit or scope of the invention. In particular, the apparatus could be used for processing other powdered, granular or particulate products that need to be unpackaged in a hygienic and contamination free environment.
Claims (14)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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NZ58085809 | 2009-10-30 | ||
NZ580858 | 2009-10-30 | ||
PCT/NZ2010/000210 WO2011053165A1 (en) | 2009-10-30 | 2010-10-20 | Apparatus for the handling of multiwall bags containing powdered or particulate material |
Publications (2)
Publication Number | Publication Date |
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US20120213620A1 true US20120213620A1 (en) | 2012-08-23 |
US9187200B2 US9187200B2 (en) | 2015-11-17 |
Family
ID=43922303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/505,046 Expired - Fee Related US9187200B2 (en) | 2009-10-30 | 2010-10-20 | Apparatus for the handling of multiwall bags containing powdered or particulate material |
Country Status (4)
Country | Link |
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US (1) | US9187200B2 (en) |
EP (1) | EP2493767B1 (en) |
CN (1) | CN102612468B (en) |
WO (1) | WO2011053165A1 (en) |
Cited By (3)
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US20150128536A1 (en) * | 2012-01-19 | 2015-05-14 | Xinyu Liu | Cooking material dispensing method and dispensing system |
CN104801481A (en) * | 2015-04-20 | 2015-07-29 | 高城 | High-efficiency material bag separating device |
CN111922051A (en) * | 2020-08-12 | 2020-11-13 | 汤子旋 | Wrapping bag recovery processing device |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN103950601A (en) * | 2014-05-10 | 2014-07-30 | 葵花药业集团(冀州)有限公司 | Packaging bag tearing machine |
WO2020046146A1 (en) * | 2018-08-31 | 2020-03-05 | Powder Projects Limited | Apparatus and method for processing of step top glued bags |
CN112569864A (en) * | 2020-11-18 | 2021-03-30 | 宁波职业技术学院 | Intelligent chemical feeding device |
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- 2010-10-20 WO PCT/NZ2010/000210 patent/WO2011053165A1/en active Application Filing
- 2010-10-20 EP EP10827205.5A patent/EP2493767B1/en not_active Not-in-force
- 2010-10-20 US US13/505,046 patent/US9187200B2/en not_active Expired - Fee Related
- 2010-10-20 CN CN201080048299.8A patent/CN102612468B/en active Active
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US20150128536A1 (en) * | 2012-01-19 | 2015-05-14 | Xinyu Liu | Cooking material dispensing method and dispensing system |
US9446876B2 (en) * | 2012-01-19 | 2016-09-20 | Xinyu Liu | Cooking material dispensing method and dispensing system |
CN104801481A (en) * | 2015-04-20 | 2015-07-29 | 高城 | High-efficiency material bag separating device |
CN111922051A (en) * | 2020-08-12 | 2020-11-13 | 汤子旋 | Wrapping bag recovery processing device |
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EP2493767B1 (en) | 2014-04-02 |
WO2011053165A1 (en) | 2011-05-05 |
US9187200B2 (en) | 2015-11-17 |
CN102612468A (en) | 2012-07-25 |
EP2493767A4 (en) | 2013-04-24 |
CN102612468B (en) | 2014-10-29 |
EP2493767A1 (en) | 2012-09-05 |
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